FUNCTION: The brake lining gauge determines the thickness grade for brake lining inspection, and quickly and accurately detects the thickness of the brake pads, so that the owner can safely replace the brake pads and make corrections. Features: Designed to inspect directly on the rotor or at a 90 degree angle on the rotor with an offset tip, so the jig can be used in many applications without disassembling the wheel assembly or caliper < p>Material: durable and flexible acetal. Made of premium material, not easy to fade, durable to use. USE TIPS: Pressure gauge color coding matches SAE or metric recommendations for brake pad replacement. Practical and convenient home gadgets. Specification: < p>Suitable for: detecting the thickness of brake pads. red ruler: 2.3 mm, the pads must be replaced. Yellow rule: 4mm, 5mm, 6mm in the process of dangerous driving, recommend replacement. green rule: 8mm, 10mm, 12mm brake pads is good, is in good working condition. Thickness: 0.01-1.0mm. Vehicle Protection Tool: Metric Feeler Gauge. Auto Service Tools: Large Scale Ruler. FEELER : Car brake pad detection. Wear a measuring device: brake lining thickness gauge. Pad measurement gauge: thickness gauge. Material: Plastic. Feeler Style: Offset. Note: The size is measured by hand, please allow slight measurement errors. Due to the ;Color display of different monitors, photo color may be slightly different from the actual product. Packing List: 1pc * Brake Pads Feeler Gauge< /p>